Drive for paper-making machines



B. A. MALKIN Filed April 1926 DRIVE FOR PAPER MAKING MACHINES Feb. 1 1927.

' JNVENTOR BERNARDAM/ILKIN A T1 ORNE Y BERNARD A. MALKI'N. F

1,616,382 PATENT OFFICE.

LAcnmE, oun nsc, cannon.

DRIVE FOR PAPER-MAKING MACHINES.

Application filed April 19, 1926. Serial No. 103,106.-

This invention relates to new and useful in'lprovements in paper making machines and particularly to the driving mechanism therefor, and the object of the invention is to provide a simple and economical driving mechanism which will be efficient in operation and so positioned that all parts thereof will be accessible for repairs and the like.

Another object is to provide a driving mechanism of the class stated which will be compact in appearance and to one side of the mechanism.

In my invention I provide a main driving shaft, which extends from end to end of the machine and adapted to positively drive a plurality of drier rolls, through the medium of suitable reductions of gearing, one set to each drier roll. The drier roll driving gear for each roll is mounted on auxiliary shafts one to each roll and each auxiliary shaft is positively driven from the main driving shaft.

In the drawings which illustrate my invention- Figure 1 'is a partial side elevation of a paper making machine with tooth spur wheels and worm gears forming the driving mechanism between each drier roll and the main driving shaft.

Figure 2 is a partial end elevation of the mechanism show'nin Figure 1.

Figure 3 is a partial side elevationof a paper making machine) with I chain and sprocket mechanism and worm and worm gears forming the driving mechanism between the drier roll and the main driving shaft.

Figure 4 is a partial end elevation of the mechanism shown in Figure 2.

Figure 5 is a partial side elevation of a paper making machine similar to that shown in Figure 1 with bevel tooth wheels, substituterl for the worm gears.

Figure 6 is a partial end elevation of" the mechanism shown in Figure 5.

Figure 7 is -a partial side elevation of a machinesimilar to that shown in Figure 5, with chain and sprocket mechanism substituted for the spur tooth wheel driving mechanism.

Figure 8 is an end elevation of the device shown in Figure 7.

Referring more particularly to the drawings, 11 designates the upper drier rolls and 12 the lower drier rolls which are securely mounted on and adapted to rotate with the of bearings being secured to the main frame 17 of the machine by any suitable means and in such a manner that each upper roll is positioned between but spaced from the adj acent lower rolls. Guide rolls 18 and 19 are mounted between the upper rolls and lower rolls respectively and may be rotatably mounted in bearings 20, secured to bracket or hearing 15 and in bearings 21 secured to the main frame of the a machine. The upper felt 22 passes over the uppermost side of the upper drier rolls and over the lowermost side of the guide rolls 18, while the lower felt 23 passes over the lowermost side of the lower drier rolls and over the uppermost sideor face of the guide rolls. These felts are of the endless type and are adapted to guide and hold the paper sheet 24 in its proper position as it passes from one end of the machine to the other. The travel of the paper sheet is indicated by the arrow 25 and as will be seen passes first over one upper and then under one lower roll and between the felts and faces of the rolls and soon in this manner through the machine. The drier roll spindles extend beyond the outer faces of the bearings at one side of the machine. The above mechanism is well known in this art and my improvement lies in providing suitable driving mechanism which will efliciently drive the rolls. In Figures 1 to 4 respectively, I have shown worm wheels 26 secured to the drier roll spindles and driven by worms 27 formed integral with or secured to auxiliary shafts 28, rotatably mounted in suitable bearings 28*, which may be secured to any fixed part of the machine. These auxiliary shafts are positioned at right angles to the roll windles having the longitudinal axes lying parallel with the main driving shaft 29, which is also rotatably mounted in suitably fixed bearings 30 and extends from end to'end of -the machine. One auxiliary shaft is provided for each drier roll. The auxiliary shafts may be driven from the main. shaft by means of the toothed gear wheels 31 and 32, as shown inFigures 1 and 2, or they may be driven by means of the chain 33 and toothed sprocket wheels 34 and 35, as shown in Figures 3 and 4. The worm and worm wheels may be provided with oil tight gear cases 36, which may be partially filled with oil to form an easy means of lubrieating the Contacting or running surfaces of the gears. The spur toothed ear wheels or the chain and toothed s roc et mechanisin may be enclosed by 011 tight casingsa somewhat similar manner tothe similar shafts shown in Figures 1 to 4, and parallel to the main driving shaft 29, which extends from end to end of thermachine and is preferably positioned midway between the roll drivin spindles with its longitudinal axes at right angles to the longitudinal axes of the roll driving spindles. The drivingconnection between each of the auxiliary shafts and the main driving shaft may be through the medium of the spur tooth gear wheels 31 and 32 secured to the auxiliary'shafts and the main shaft respectively, as shown in Figures5 and 6, or the driving means may consist of toothed sprocket wheels 34 and 35 the former secured to the auxiliary shafts and the latter to the main shaft with endless chains 33 connecting them together. The main driving shaft may be driven frofn a source not shown, but preferably at a point midway between its ends, so that the angular twist of the shaft while under operation may be reduced to a minimum.

Modifications may be made .in the construction and arrangement of the parts forming the driving mechanism without departing from the spirit of the invention.

In operation the main shaft is driven from a source, not shown, and simultaneously drives each of the auxiliary shafts which in turn drive a drier roll. The gearing or driving connection between the main shaft and the auxiliary shafts are positive, that is toothed gearing or chains and tooth sprockets are used so thatthere is no slip between them. Positive gearing in the form of worm wheels or bevelled toothed pinions and wheels are used between the auxiliary shafts and the roll driving spindles. The

arrangement of gears is simple and compact 'ing shaft, positive driving mechanism between the main driving shaft and each of the auxiliary shafts and positive driving mechanism between each auxiliary shaft and its adjacent drier roll.

2. In a drive for paper making machines having parallel rows of drier rolls, rotatably mounted in suitable framing, a main driving shaftpositioned between the rolls and having its longitudinal axis at right angles to the axes of the drier rolls, a plurality of auxiliary driving shafts one for each drier roll and lying parallel with the main driving shaft, positive driving mechanism between the main driving shaft and each auxiliary shaft, and positive driving mechanism between the auxiliary shafts and their adjacent drier rolls. e

3. In a driving mechanism for paper making machines having two parallel-rows of drier rolls rotatably mounted in suitable framing members, a main driving shaft positioned between the rows of drier rolls and having its longitudinal axis at right angles to the longitudinal axes of the drier rolls, a plurality of auxiliary driving shafts rotatably mounted in suitable bearings and p0- sitioned in close proximity to the drier rolls and lying parallel to the main driving shaft, toothed gearing between. the main driving shaft and the auxiliary shaft and positive driving mechanism between each auxiliary 1 shaft and its adjacent drier roll.

4. In a driving mechanism according to claim 4, having toothed gearing between the auxiliary driving shafts and each drier roll. 'In wltness whereof, I have hereunto set m hand.

y i BERNARD A. MALKIN. 

